The invention relates to a wire coil, and discloses a self-adjusting wire coil. The wire coil comprises a classis, a
rotating disc and a telescopic rod, wherein the
chassis is composed of a base and auniversal
ball bearing and is used for supporting the
rotating disc, the
rotating disc is provided with line grooves, and the line grooves are used for fixing the telescopic rod; the telescopic rod is fixed on the rotating disc through a spring, and the shape of a coil is kept through the spring; the
chassis is a circular truncated cone, the
diameter of the upper bottom is 40 mm, and the diameterof the lower bottom is 60 mm; the
chassis is provided with a screw hole, and the screw hole is used for fixing the universal
ball bearing; the chassis is made of aluminum
alloy material; the diameterof a rolling ball of the universal
ball bearing is 10 mm; the
diameter of the rotating disc is 100 mm with the thickness of 30 mm, and the rotating disc is made of aluminum
alloy; the cross-shaped line grooves are formed in the rotating disc, and the number of the cross-shaped line grooves is 3; the length of the telescopic rod is 45 mm, and the telescopic rod is fixed on the rotating disc through the spring; the telescopic rod is made of the aluminum
alloy material; the telescopic rod 2 is arranged in the line rooves of the rotating disc 3 and is connected with the rotating disc 3 through the spring; the rotating disc 3 is arranged on the chassis 1; and the coil is fixed on the telescopic rod, under the action of the spring, the coil is tensioned, a wire head is pulled, and the rotatingdisc rotates along with the coil.